The Bomag 05544020 Test Connection is a genuine OEM component designed for Bomag tandem rollers, including the BW 138 AD, BW 138 AC, BW 138-AD, BW 135 AD, BW 120 AD-3, and BW120 AD-3. As a factory-original part, this test connection is manufactured to the exact specifications required by Bomag's hydraulic and diagnostic systems. Technicians servicing these tandem rollers can trust this component for accurate, reliable diagnostic access. Confirm part number 05544020 against your machine's documentation before ordering to ensure a correct match.
Key Features
- Genuine OEM Construction — Manufactured to Bomag's exact material and dimensional standards for hydraulic diagnostic connections, ensuring accurate pressure readings and leak-free port engagement.
- Direct-Fit Replacement — Engineered to install directly into the designated test port on supported Bomag tandem rollers, with correct thread form and port geometry for immediate use.
- Broad Tandem Roller Coverage — Compatible with the BW 138 AD, BW 138 AC, BW 138-AD, BW 135 AD, BW 120 AD-3, and BW120 AD-3 tandem rollers.
- Diagnostic Integrity — A correctly seated test connection provides a sealed, accurate tap point for pressure gauges and diagnostic tools, so technicians get dependable readings without fluid loss or port damage.
- Verified Part Number — Order with confidence using part number 05544020, cross-referenced directly from Bomag's OEM parts catalog for these tandem roller models.
A test connection is a precision-threaded diagnostic port fitting that provides technicians with a safe, sealed access point for attaching pressure gauges or diagnostic instruments to a machine's hydraulic circuit. On Bomag tandem rollers, these fittings are used to monitor system pressure, diagnose performance issues, and verify hydraulic health during routine service and troubleshooting. A damaged or missing test connection can prevent accurate diagnosis, lead to fluid contamination at the port, or cause incorrect pressure readings that mask underlying system faults.
Part Details
| Part Number | 05544020 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Test Connection |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 138 AD | 00810105, 00817473, 00818359 |
| Tandem Roller | BW 135 AD | 00810120 |
| Tandem Roller | BW 138 AC | 00817472, 00818361 |
| Tandem Roller | BW 138-AD | 00817572, 00818389 |
| Tandem Roller | BW 120 AD-3 | 00817831 |
| Tandem Roller | BW120 AD-3 | 00817849 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
